Temp Alameda County ITE Materials

Produced by: Safe Streets Research & Consulting

Authors

Jessica Schoner, PhD

Brian Almdale, MUPP

Rebecca Sanders, PhD RSP2B

Published

August 6, 2025

1 Introduction

Note

Include some kind of text here describing whats in this document. Describe what the SSM and Sliding Windows do and overview of SSPF. Anything else?

2 Safer Streets Priority Finder Results

Note

Touch on what the SSPF spits out.

2.1 Sliding Windows Analysis

2.2 Safer Streets Model

3 Safer Streets Model Maps

3.1 Alameda County

Bicyclists

Figure 1: Safe Streets Model Results - Bicyclist Crashes, Alameda County, 2020-2024 (exclude freeways/expressways)


Pedestrians

Figure 2: Safe Streets Model Results - Pedestrian Crashes, Alameda County, 2020-2024 (exclude freeways/expressways)

4 Developing a High Injury Network (HIN)

Note

Describe how to use the results and set thresholds for a HIN.

4.1 Estimated Crashes using SSPF Results

Alameda County

Table 1: Summary of HIN Thresholds, Mileage, and Estimated KA Capture Rate - Bicyclist Crashes, Alameda County, Excludes Freeways
Bin Minimum 5-Year Estimated Cost # Miles % Miles # Est. KA % Est. KA # Est. Crashes % Est. Crashes Density of Est. KA Crashes Per Mile Change in Miles Added by Lowering Threshold From Row Above to This Row Change in Est. KA Crashes Added by Lowering Threshold From Row Above to This Row
1 $0 1,796.8 100.0% 118.4 100.0% 669 100.0% 0.07 1,269.6 37.46
2 $0 527.2 29.3% 81.0 68.4% 505 75.5% 0.15 322.2 31.69
3 $3,155 205.0 11.4% 49.3 41.6% 311 46.5% 0.24 115.0 24.86
4 $15,620 90.0 5.0% 24.4 20.6% 162 24.2% 0.27 38.8 12.27
5 $140 51.2 2.9% 12.2 10.3% 85 12.7% 0.24 13.0 2.89
6 $585 38.2 2.1% 9.3 7.8% 67 10.0% 0.24 11.3 1.89
7 $366 26.9 1.5% 7.4 6.2% 53 7.9% 0.27 11.1 2.13
8 $7,624 15.8 0.9% 5.3 4.4% 38 5.7% 0.33 8.5 2.57
9 $11,306 7.3 0.4% 2.7 2.3% 22 3.3% 0.37 5.5 1.59
10 $118,226 1.8 0.1% 1.1 0.9% 7 1.0% 0.60 1.8 1.10
Total $157,022 2,760.4 153.6% 118.4 100.0% 669 100.0% 0.04 1,796.8 118.45


Table 2: Summary of HIN Thresholds, Mileage, and Estimated KA Capture Rate - Pedestrian Crashes, Alameda County, Excludes Freeways
Bin Minimum 5-Year Estimated Cost # Miles % Miles # Est. KA % Est. KA # Est. Crashes % Est. Crashes Density of Est. KA Crashes Per Mile Change in Miles Added by Lowering Threshold From Row Above to This Row Change in Est. KA Crashes Added by Lowering Threshold From Row Above to This Row
1 $0 1,796.8 100.0% 353 100.0% 1,845 100.0% 0.20 1,269.6 30.56
2 $229,977 527.2 29.3% 322 91.3% 1,607 87.1% 0.61 322.2 81.75
3 $683,935 205.0 11.4% 241 68.2% 1,106 59.9% 1.17 115.0 84.27
4 $1,372,680 90.0 5.0% 156 44.3% 657 35.6% 1.74 38.8 52.15
5 $2,693,737 51.2 2.9% 104 29.5% 391 21.2% 2.04 13.0 17.07
6 $4,359,269 38.2 2.1% 87 24.7% 318 17.2% 2.28 11.3 16.77
7 $5,768,664 26.9 1.5% 70 20.0% 265 14.4% 2.62 11.1 21.34
8 $7,135,349 15.8 0.9% 49 13.9% 199 10.8% 3.11 8.5 20.02
9 $9,203,264 7.3 0.4% 29 8.2% 130 7.0% 3.97 5.5 19.89
10 $13,459,575 1.8 0.1% 9 2.6% 39 2.1% 4.98 1.8 9.19
Total $44,906,450 2,760.4 153.6% 353 100.0% 1,845 100.0% 0.13 1,796.8 353.03


4.2 Estimated Crashes Using Sliding Windows Results

Alameda County

Table 3: Summary of HIN Thresholds, Mileage, and Observed KA Capture Rate - Bicyclist Crashes, Alameda County, Excludes Freeways
Sliding Window Score # Miles % Miles # Obs. KA % Obs. KA # Obs. Crashes % Obs. Crashes Density of Est. KA Crashes Per Mile Change in Miles Added by Lowering Threshold From Row Above to This Row Change in Obs. KA Crashes Added by Lowering Threshold From Row Above to This Row
0 1,797 100.0% 756 100.0% 7,025 100.0% 42.1% 1,404 0
1 393 21.9% 756 100.0% 6,101 86.8% 192.3% 194 6
2 199 11.1% 750 99.2% 4,293 61.1% 376.5% 70 10
3 130 7.2% 740 97.9% 3,216 45.8% 571.3% 51 251
4 78 4.3% 489 64.7% 2,527 36.0% 625.8% 32 151
5 47 2.6% 338 44.7% 1,835 26.1% 725.9% 15 63
6 32 1.8% 275 36.4% 1,440 20.5% 864.5% 11 74
7 21 1.2% 201 26.6% 1,117 15.9% 965.0% 6 43
8 15 0.8% 158 20.9% 891 12.7% 1 084.7% 5 56
9 10 0.5% 102 13.5% 640 9.1% 1 044.2% 5 50
10+ 5 0.3% 52 6.9% 387 5.5% 1 029.1% 5 52
Total 2,725 151.7% 756 100.0% 7,025 100.0% 27.7% 1,797 756


Table 4: Summary of HIN Thresholds, Mileage, and Observed KA Capture Rate - Pedestrian Crashes, Alameda County, Excludes Freeways
Sliding Window Score # Miles % Miles # Obs. KA % Obs. KA # Obs. Crashes % Obs. Crashes Density of Est. KA Crashes Per Mile Change in Miles Added by Lowering Threshold From Row Above to This Row Change in Obs. KA Crashes Added by Lowering Threshold From Row Above to This Row
0 1,797 100.0% 756 100.0% 7,025 100.0% 42.1% 1,418 268
1 378 21.1% 488 64.6% 4,456 63.4% 129.0% 158 118
2 220 12.2% 370 48.9% 3,352 47.7% 168.1% 43 47
3 177 9.8% 323 42.7% 2,992 42.6% 182.7% 71 60
4 106 5.9% 263 34.8% 2,428 34.6% 248.2% 35 62
5 71 4.0% 201 26.6% 1,907 27.1% 281.9% 14 24
6 57 3.2% 177 23.4% 1,646 23.4% 310.1% 15 40
7 42 2.3% 137 18.1% 1,332 19.0% 325.0% 13 36
8 29 1.6% 101 13.4% 1,006 14.3% 349.7% 7 28
9 22 1.2% 73 9.7% 838 11.9% 332.4% 5 16
10 17 1.0% 57 7.5% 696 9.9% 332.9% 3 5
11 15 0.8% 52 6.9% 629 9.0% 358.1% 4 15
12 11 0.6% 37 4.9% 456 6.5% 344.2% 2 11
13 9 0.5% 26 3.4% 374 5.3% 297.1% 2 4
14 7 0.4% 22 2.9% 305 4.3% 323.4% 1 2
15+ 6 0.3% 20 2.6% 263 3.7% 349.8% 6 20
Total 2,963 164.9% 756 100.0% 7,025 100.0% 25.5% 1,797 756


5 Conclusion / Next Steps